The following updates has been released for CentOS 6:

CESA-2017:2424 Critical CentOS 6 java-1.7.0-openjdk Security Update
CESA-2017:2456 Critical CentOS 6 firefox Security Update
CESA-2017:2478 Critical CentOS 6 httpd Security Update

CESA-2017:2424 Critical CentOS 6 java-1.7.0-openjdk Security Update

CentOS Errata and Security Advisory 2017:2424 Critical

Upstream details at : https://access.redhat.com/errata/RHSA-2017:2424

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

i386:
53a24f4fed4dffa5d60f5f6f5aae09cae0d5aa675aae5c89bc89568f150c375b java-1.7.0-openjdk-1.7.0.151-2.6.11.0.el6_9.i686.rpm
87ed44696e8f5d9f3a409e48e8e45c9963ee8bd5d66d85432f99fde5fe700fc6 java-1.7.0-openjdk-demo-1.7.0.151-2.6.11.0.el6_9.i686.rpm
a22a1605fd7fd61c1edff42b837d048263c9ed3d62ddc6cb057df9db9b8488d3 java-1.7.0-openjdk-devel-1.7.0.151-2.6.11.0.el6_9.i686.rpm
ab1fa5c00fc66e895c699909ba6f7a033359a2cb6c853b45db77bac414f83faa java-1.7.0-openjdk-javadoc-1.7.0.151-2.6.11.0.el6_9.noarch.rpm
ddc41007c6b80e937826f9b08adb8529537e45224b7d9c77e88a5137333dec08 java-1.7.0-openjdk-src-1.7.0.151-2.6.11.0.el6_9.i686.rpm

x86_64:
bd3d2e33f5f05c97acdb4463ee838e1ac990de77704401a13cbee82d6359c93b java-1.7.0-openjdk-1.7.0.151-2.6.11.0.el6_9.x86_64.rpm
077188b99553fa5323ce61ae133048b4a3fbf12bb6feeb494734af627cf5fb62 java-1.7.0-openjdk-demo-1.7.0.151-2.6.11.0.el6_9.x86_64.rpm
aa5efd1300c3240590bf4ecaaf00040eb1a3ae3674279de2c768c734921eef85 java-1.7.0-openjdk-devel-1.7.0.151-2.6.11.0.el6_9.x86_64.rpm
ab1fa5c00fc66e895c699909ba6f7a033359a2cb6c853b45db77bac414f83faa java-1.7.0-openjdk-javadoc-1.7.0.151-2.6.11.0.el6_9.noarch.rpm
51f85429d7fb4aebb500b6ba73e717f7dbc6597191db9dd8c0b108d9f1e7aac4 java-1.7.0-openjdk-src-1.7.0.151-2.6.11.0.el6_9.x86_64.rpm

Source:
f7fea14d8c97e7251cb3129c2c0bc23485ed534d36f80a9e1feb6d301abbe207 java-1.7.0-openjdk-1.7.0.151-2.6.11.0.el6_9.src.rpm

CESA-2017:2456 Critical CentOS 6 firefox Security Update

CentOS Errata and Security Advisory 2017:2456 Critical

Upstream details at : https://access.redhat.com/errata/RHSA-2017:2456

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

i386:
f29636840b84fd6d5a4a102d02a19c569a3c8e5bb122fffab931a57fdaf87ae8 firefox-52.3.0-3.el6.centos.i686.rpm

x86_64:
f29636840b84fd6d5a4a102d02a19c569a3c8e5bb122fffab931a57fdaf87ae8 firefox-52.3.0-3.el6.centos.i686.rpm
fa94722eb61a41e0c0c12c31dab803aeb3387e9ba83ad52a305dc1880d5764b8 firefox-52.3.0-3.el6.centos.x86_64.rpm

Source:
85eb85c49ccac809e5eb899b3680735e5ba1521c378866ccfa98982462801152 firefox-52.3.0-3.el6.centos.src.rpm

CESA-2017:2478 Critical CentOS 6 httpd Security Update

CentOS Errata and Security Advisory 2017:2478 Critical

Upstream details at : https://access.redhat.com/errata/RHSA-2017:2478

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

i386:
68b712bfb3b1a08748f4bdac924dc30fa5683977333c9ff052a525d2e9347259 httpd-2.2.15-60.el6.centos.5.i686.rpm
aeff46346d66dcb687524a05882f21b6c7596f433859c2a443354af33bc3deed httpd-devel-2.2.15-60.el6.centos.5.i686.rpm
ae7886ff13fef00ae7272ccced1ec6e3d4cdd0db02a3e9ba37a37d7b7548d087 httpd-manual-2.2.15-60.el6.centos.5.noarch.rpm
30d1a73a78e580d5314b7140799e23af42c0023560c863ceab681eae175e815b httpd-tools-2.2.15-60.el6.centos.5.i686.rpm
c6ee5b709d021faaa9abd61f8316948ed2043ce53d935b9063285bf3d41994f8 mod_ssl-2.2.15-60.el6.centos.5.i686.rpm

x86_64:
6c4577f55b8b3f40a1223be39a61ee1185ce7b9a0588ef4ad60fbf45d5e431e7 httpd-2.2.15-60.el6.centos.5.x86_64.rpm
aeff46346d66dcb687524a05882f21b6c7596f433859c2a443354af33bc3deed httpd-devel-2.2.15-60.el6.centos.5.i686.rpm
4c9cc089ac1d30b9b50bd1ff2a2a3eaf0c09cc969b0b543f6a7d9ffd01f5cf4f httpd-devel-2.2.15-60.el6.centos.5.x86_64.rpm
ae7886ff13fef00ae7272ccced1ec6e3d4cdd0db02a3e9ba37a37d7b7548d087 httpd-manual-2.2.15-60.el6.centos.5.noarch.rpm
5cc5dfdd78d76f2c020cfab998363aa8345cdc477d48af3a1c1cd48dd364098f httpd-tools-2.2.15-60.el6.centos.5.x86_64.rpm
b2f9c90fc09cb85894f20ead9cbf4405cf92ac1748860aa280e7af96c21e17fb mod_ssl-2.2.15-60.el6.centos.5.x86_64.rpm

Source:
ee426ab362997f52fcfd19d7e5610359d47a3a5439cbba2ecff7455c35bd9b85 httpd-2.2.15-60.el6.centos.5.src.rpm